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Silicon-carbon-oxygen ceramic microbead, preparation method and application thereof

A silicon carbide ceramic and microbead technology, applied in optics, instruments, nonlinear optics, etc., can solve the problem that the LCD screen industry has not achieved localization, tens of thousands to hundreds of thousands of yuan, uniform sphericity and particle size. problems such as poor particle size distribution, to achieve the effect of narrow particle size distribution, smooth surface and good thermal stability

Active Publication Date: 2021-02-23
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the preparation technology of ceramic microspheres mainly includes two types: the first one is the high-temperature melting method of glass powder developed in Japan. The diameter is graded, so the production cost is high, and the selling price is tens of thousands to hundreds of thousands of yuan per kilogram
The second is the seed swelling method developed by Suzhou Nanomicro Technology. Nanosph

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  • Silicon-carbon-oxygen ceramic microbead, preparation method and application thereof
  • Silicon-carbon-oxygen ceramic microbead, preparation method and application thereof
  • Silicon-carbon-oxygen ceramic microbead, preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0059] For the silicon-carbon-oxygen ceramic microbeads in this embodiment, an organic compound precursor containing silicon-hydrogen bonds and carbon-carbon unsaturated bonds is selected as the precursor, and the precursor is liquid at room temperature and has the characteristic of changing from liquid to solid state. Mix it with a high-boiling point and high-viscosity emulsification system, and use the characteristic that the organic compound precursor containing silicon-hydrogen bonds and carbon-carbon unsaturated bonds will form into balls due to surface tension in the high-boiling point and high-viscosity emulsification system to achieve spherical shape. Formation of the structure, and then use thermal curing treatment to maintain the spherical shape, and then heat it to ceramize it to prepare ceramic microbeads. The preparation process specifically includes:

[0060] S1. Synthesis of precursors: In this embodiment, the organic compound precursor containing silicon-hydroge...

Embodiment 2

[0083] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are:

[0084] The preparation process of the silicon carbon oxide ceramic microbeads of the present embodiment specifically includes:

[0085] S1. Synthesis of precursors: In this embodiment, the organic compound precursor containing silicon-hydrogen bonds and carbon-carbon unsaturated bonds is specifically selected as hydrogen-containing polysiliconacetylene, and the synthesis of hydrogen-containing polysiliconacetylene adopts a one-pot method. Specific steps are as follows:

[0086] S11. Polymerization of hydrogen-containing polysiliconacetylene is carried out in a fume hood, the temperature of the whole process is maintained at 0-4°C, and it is strictly anhydrous and oxygen-free. First, put the 2L reaction kettle in an ice-water bath (0°C), turn on the condensing circulating water and pass hi...

Embodiment 3

[0102] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are:

[0103] The preparation process of the silicon carbon oxide ceramic microbeads of the present embodiment specifically includes:

[0104] S1. Synthesis of precursors: In this embodiment, the organic compound precursor containing silicon-hydrogen bonds and carbon-carbon unsaturated bonds is specifically selected as hydrogen-containing polysiliconacetylene, and the synthesis of hydrogen-containing polysiliconacetylene adopts a one-pot method. Specific steps are as follows:

[0105] S11. Polymerization of hydrogen-containing polysiliconacetylene is carried out in a fume hood, the temperature of the whole process is maintained at 0-4°C, and it is strictly anhydrous and oxygen-free. First, put the 2L reaction kettle in an ice-water bath (0°C), turn on the condensing circulating water and pass hi...

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Abstract

The invention relates to a silicon-carbon-oxygen ceramic microbead, a preparation method and application thereof. An organic compound precursor containing a silicon-hydrogen bond and a carbon-carbon unsaturated bond is creatively selected as a precursor, and the precursor is mixed with a high-boiling-point and high-viscosity emulsification system by utilizing the characteristic that the precursoris in a liquid state at room temperature and changes from liquid state to solid state, a spherical structure is generated by utilizing the characteristic that a precursor forms spheres in an emulsification system due to the action of surface tension, then the spheres are kept unchanged by utilizing thermocuring treatment, and the ceramic microbead is prepared through ceramization by heating, the preparation process is simple to operate, the required raw materials do not need to be imported, local production is easy, the cost is low, and the preparation period is short to 2 days, the particle size of the obtained ceramic microbead is small, the particle size range distribution is narrow, the hardness is high (10% K value is larger than 8000N/mm<2>), the thermal stability is good, the ceramic microbead is not decomposed at 1000DEG C, and the ceramic microbead is black, light-proof and free of light leakage.

Description

technical field [0001] The invention relates to a preparation technology of ceramic microspheres, in particular to a silicon carbon oxide ceramic microsphere and a preparation method and application thereof. Background technique [0002] Liquid crystal display LCD is a technology that uses liquid crystal deflection to control light transmittance to achieve color display. The liquid crystal is filled in the liquid crystal cell of the LCD, and must maintain a certain effective thickness to ensure the ability to deflect light. The upper and lower panels of the liquid crystal cell are filled with spacers of fixed size, which can resist deformation and return to deformation under the action of external force. The size of the spacer seriously affects the quality of the liquid crystal panel, so it needs to be highly uniform. Commonly used spacers include polyimide particles, fiber optic particles, silica microspheres, etc., which vary in material and shape, including spherical and...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/622G02F1/1339
CPCC04B35/5603C04B35/622G02F1/13392
Inventor 温广武侯永昭仲诚
Owner SHANDONG UNIV OF TECH